Lineman&#39;s protective sleeve and method of making the same



. Jan. 22, 1935. A. B.'MERR|LL ET AL 1,988,604

LINEHAN'S PROTECTIVE SLEEVE AND METHOD MAKING THE SAME Filed May 13, 1931 JET/277727225 fl//az7 .ETZEEEi/Z Chiba L 'iu fis Patented Jan. 22, 1935 I UNITED STATES PATENT OFFICE LINEMANS PROTECTIVE SLEEVE AND METHOD OF MAKING THE SAME Allan B. Merrill, Aaron, and Chalmer 0. Curtis, Cuyahoga Falls, Ohio, assignors to The B. F. Goodrich Company, New York, N. Y., a corporation of New York Application May. 13, 1931, Serial No. 537,180 Claims. (Cl. 173-28) This invention relates to devices for protecttions, wrapping the assembly with a fabric wraping linemen from high-tension wires and its chief per, and further vulcanizing the spiral wrapping objects are eflective protection, prevention of of rubber. dangerous migration of water into the device, In so producing the sleeve the drip lip 15 may ease of application, security against accidental be provided either by cutting away a portion of displacement of the device, and economy of manthe margin of the sleeve after vulcanization or ufacture. by employing a suitable forming member between 0! the accompanying drawing: the sleeve and the wrapping during vulcaniza- Fig. 1 is a perspective view of a portion of 9. tion.

wire and, mounted thereon, a protective sleeve The recesses 16, 17 may be formed either by 10 embodying our invention in its preferred form. abrading or cutting the sleeve after vulcanization Fig. 2 is an end elevation of the device. or by employing suitable molding members in Referring to the drawing, the sleeve, 10, is of addition to or as a part of the liner" during volute or spiral form, is of flexible, dielectric vulcanization. material, preferably rubber, and preferably is so The sleeve is mounted by so rotating it about formed that each convolution will be caused, by the wire as to cause the wire to pass between its the resilience of the material to lie close to, and convolutions into its interior, and is dismounted preferably in contact with, the next. by the reverse operation.

The sleeve preferably is of elongated form in We claim:

20 cross-section, so that when it is properly mounted 1. A linemans protective sleeve adapted to be 20 upon the wire rotation of the sleeve will be redetachably mounted upon an electrical conductor, sisted by gravity. The innermost convolution, said sleeve comprising a sheet of resilient, di- 11, preferably terminates in a longitudinal marelectric material having when in unstrained congin 12 lying in the lower part of the sleeve when dition a spiral form of substantially more than the sleeve is properly mounted upon the wire, so one turn and of elongated cross-sectional form.

that water reaching that margin would still be 2. The method of making a linemans protecfar from the wire, and the outer convolution, 13, tive sleeve which comprises winding a sheet of preferably terminates in a longitudinal margin rubber composition upon a mandrel with a liner,

14 at the bottom of the exterior of the sleeve, so and wrapping and vulcanizing the sheet, the sheet that the contacting surfaces of it and the underbeing formed with an external drip lip. 30 lying convolution lead upward, against gravity, 3. The method of making a linemans protecfor resistance to migration of water, and so that tive sleeve which comprises winding a sheet of water on said margin will be drawn by gravity rubber composition upon a mandrel with a liner,- away from and not toward the underlying con- 'and wrapping and vulcanizing the sheet, the sheet volution. being formed with a recess for interrupting cap- 35 The said margin preferably is formed with an illary attraction.

acute longitudinal drip lip 15 for effective re- 4. The method of making a linemans protecmoval of water therefrom by gravity. tive sleeve which comprises winding a sheet of To interrupt capillary attraction between conrubber composition upon a mandrel with a liner, 0 volutions the convolutions preferably are formed and wrapping and vulcanizing the sheet, the sheet 40 with half-circle, longitudinally disposed recesses being formed with an external drip lip and a reas at 16, 17, which may mate as shown in Fig. 2 cess to interrupt capillary attraction. or may occupy circumferentially offset positions 5. The method of making a linemans protecas in Fig. 1, the said recesses providing reservoirs tive sleeve which comprises partially vulcanizing and discharge channels for moisture accumulated a sheet of rubber composition, winding-it upon 4 in them by capillary attraction, surface migraa mandrel with a liner, wrapping the assembly, tion or otherwise as well as to interrupt the vulcanizing it, and removing the liner, mandrel capillary attraction. and wrapper to provide a sleeve having, in its un- The sleeve preferably is manufactured by wrapstrained condition, surfaces in juxtaposition. ping a semi-cured sheet of rubber upon a suitable mandrel with a thin sheet of non-adhesive ALLAN B. MERRILL. material or liner interposed between the convolu- CHALMER C. CURTIS. 

